Air filtration device



FIG. 1 is a perspective view of the air filtration device in accordance with our new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right-side elevational view thereof;

FIG. 5 is a left-side elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a bottom plan view thereof.

The broken lines in the figures are for illustrative purposes only and form no part of the claimed design. 

The ornamental design for an air filtration device, as shown and described. 